html,
body {
    height: 100%;
}

#grad-class {
    min-height: 50%;
}

#grad-class-cover {
    min-height: 50%;
}

#grad-pics {
    min-height: 50%;
    text-align: center;
    margin: auto;
}


.content-title h3 {
    font-size: 56px;
    font-weight: 500;
    text-align: center;
    margin-bottom: 30px;
}

.content-title-underline {
    width: 30px;
    height: 3px;
    background-color: #000;
    margin-right: auto;
    margin-left: auto;
    margin-bottom: 30px;
}